package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * @description:
 * @author: yx
 * @createTime: 2024/01/07 21:25
 * @Department: 开发与技术支持部
 * @LastEditors: yx
 * @LastEditTime: 2024/01/07 21:25
 */
/*
 * 自定义切面
 * */

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    // 切入点
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {

    }

    // 前置通知
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("公共字段前置填充...");
        // 填充公共字段
        // 获取被拦截方法类型 update insert
        // 获取签名对象
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);// 获取方法上的注解
        OperationType operationType = autoFill.value(); // 操作类型

        // 获取当前参数实体
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];
        // 通过反射为实体的公共属性赋值
        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();

        if (operationType == OperationType.INSERT) {
            // 四个公共字段
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);
                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,id);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (operationType == OperationType.UPDATE) {
            // 两个公共字段
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
